All Flashcards
What is the effect of a non-zero net force acting on an object?
The object accelerates in the direction of the net force.
What happens when the distance between two masses increases?
The gravitational force between them decreases (inversely proportional to the square of the distance).
What is the effect of increasing the mass of an object, given a constant net force?
The acceleration of the object decreases.
What happens when an object accelerates vertically?
Its apparent weight changes.
What is the difference between Static and Kinetic Friction?
Static Friction: Opposes the start of motion. | Kinetic Friction: Opposes motion when the object is already moving.
Compare Open and Closed Systems.
Open System: Exchanges matter and/or energy with surroundings. | Closed System: No exchange of matter or energy with surroundings.
Differentiate between Conservative and Non-conservative Systems.
Conservative Systems: Total mechanical energy is conserved (Kinetic + Potential = Constant). | Non-conservative Systems: Total mechanical energy is not conserved (energy can be lost to friction, etc.).
Define Dynamics.
The study of forces and their effect on motion, explaining why objects move as they do.
What is Weight (Force of Gravity)?
The force pulling an object down due to gravity, calculated as , where g is the acceleration due to gravity.
Define Normal Force.
The force exerted by a surface on an object, always perpendicular to the surface.
What is Tension?
The pulling force exerted by a string, rope, cable, or similar object on another object.
Define Friction.
A force that opposes motion between surfaces in contact.
What is a System in Physics?
A defined collection of objects being studied, crucial for determining internal and external forces.
Define Gravitational Field.
The region around a massive object where other massive objects experience a gravitational force.
What is Inertia?
The tendency of an object to resist changes in its state of motion.